Per Apple Watch Ultra 49mm Serie 10/9/8/7/6 46/45/44mm Cinturino Silicone Bicolore
Apple Watch Series 10 46mm Also fits Apple Watch Series 1/2/3 42mm, Apple Watch Series 4/5/6 44mm, Apple Watch Series 7/8/9 45mm, Apple Watch SE 44mm, Apple Watch Ultra 49mm, Apple Watch Ultra 2 49mm.